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Planning application

8 - 9 William Street London SW1X 9HL

Granted Westminster 25/08734/FULL Full Planning Permission Application

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Installation of air conditioning plant and acoustic enclosure to the rear lower ground courtyard. Alterations to the rear lower ground floor elevation.

As published by the council, reference 25/08734/FULL

Application record

Reference
25/08734/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
1 Dec 2025
Validated
1 Dec 2025
Decided
26 Mar 2026
Ward
Knightsbridge & Belgravia
Decision by
Delegated Decision
Postcode
SW1X 9HL

Site history

Applications at this address on the Westminster register

This site has had 6 applications since 2025: 2 approved, 0 refused.

  • 26/02627/ADV Awaiting decision

    8 - 9 William Street London SW1X 9HL

    Display of internally illuminated fascia sign measuring 0.833m X 0.31m and 0.833m X 0.31m

    Submitted 21 Apr 2026 Advertising
  • 26/00188/TCH Awaiting decision

    8 - 9 William Street London SW1X 9HL

    Use of an area of pavement (part public highway and part private forecourt) measuring 3.44 m x 12.68 m for the placing of 8 tables, 24 chairs, 8 planters and a waiter station in connection with the existing ground floor restaurant.

    Submitted 14 Jan 2026
  • 25/08735/LBC Granted

    8 - 9 William Street London SW1X 9HL

    Installation of air-conditioning plant and acoustic enclosure to the rear lower ground courtyard. Alterations to the rear lower ground floor elevation.

    Decided 26 Mar 2026 Heritage and listed buildings
  • 25/08437/FULL Awaiting decision

    8 - 9 William Street London SW1X 9HL

    Shopfront painting and material finishes; wall mounted heaters and lights and replacement awning. (Linked to 25/08438/LBC)

    Submitted 18 Nov 2025 Full applications
  • 25/08438/LBC Awaiting decision

    8 - 9 William Street London SW1X 9HL

    Shopfront painting and material finishes; wall mounted heaters and lights and replacement awning. (Linked to 25/08437/FULL)

    Submitted 18 Nov 2025 Heritage and listed buildings

Timeline

Dates from the published record

  1. 1 Dec 2025

    Received by Westminster

  2. 26 Mar 2026

    Decision issued: Application Permitted

  3. 1 Aug 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

Daniel Watney LLP Agent, registered in London

Active · incorporated 2010 · London

109 applications on PlanIndex · across 17 councils · 95% granted

Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.

See their track record

Documents

Plans, drawings, consultee responses and the officer's report

21 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

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Open the documents

What this grant of permission means

Westminster granted permission on 26 March 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

About full applications

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • 8 - 9 William Street London SW1X 9HL

    25/08735/LBC Submitted 1 Dec 2025 50 yards away

    Installation of air-conditioning plant and acoustic enclosure to the rear lower ground courtyard. Alterations to the rear lower ground floor elevation.

    Granted Heritage and listed buildings 16 docs

  • 8 - 9 William Street London SW1X 9HL

    26/00188/TCH Submitted 14 Jan 2026 50 yards away

    89% historically approved · decision due ~11 Mar

    Use of an area of pavement (part public highway and part private forecourt) measuring 3.44 m x 12.68 m for the placing of 8 tables, 24 chairs, 8 planters and a waiter station in connection with the existing ground floor restaurant.

    Awaiting decision 18 docs

  • 5 - 6 William Street London SW1X 9HL

    25/04470/LBC Submitted 30 Jun 2025 50 yards away

    Installation of seven new French doors with fanlights at front elevation facing William Street; three pairs of sash windows into existing timber box frames; one new single door, including a sidelight and fanlight at rear elevation; and other associated works to first floor.

    Granted Heritage and listed buildings Windows or glazing 18 docs

  • 8 - 9 William Street London SW1X 9HL

    25/08437/FULL Submitted 18 Nov 2025 50 yards away

    87% historically approved · decision due ~11 Mar

    Shopfront painting and material finishes; wall mounted heaters and lights and replacement awning. (Linked to 25/08438/LBC)

    Awaiting decision Full applications Windows or glazing 26 docs

  • 8 - 9 William Street London SW1X 9HL

    25/08438/LBC Submitted 18 Nov 2025 50 yards away

    90% historically approved · decision due ~11 Mar

    Shopfront painting and material finishes; wall mounted heaters and lights and replacement awning. (Linked to 25/08437/FULL)

    Awaiting decision Heritage and listed buildings Windows or glazing 20 docs

  • 11 - 12 William Street London SW1X 9HL

    26/06243/ADFULL Submitted 11 Sep 2026 50 yards away

    89% historically approved · decision due ~6 Nov

    Details of the ventilation system to get rid of cooking smells, including details of how it will be built and how it will look pursuant to condition 8 of planning permission dated 1st May 2024 (RN 24/01192/FULL)

    Awaiting decision

In Westminster

  • 26/06331/FULL Awaiting decision

    31G Nottingham Place London W1U 5LP

    Installation of a condenser within acoustic enclosure and metal railing on the rear flat roof at third-floor level.

    Received 16 Sep, published by the council 23 Sep 2026 Full applications
  • 26/06328/FULL Awaiting decision

    Athena Court 2 Finchley Road London NW8 6DP

    Installation of a multifunctional communication Hub including defibrillator outside Athena Court. (Linked with 26/06329/ADV)

    Received 16 Sep, published by the council 23 Sep 2026 Full applications
  • 26/06325/FULL Awaiting decision

    29 Norfolk Road London NW8 6AU

    Hard and soft landscaping works; amendment to railings style to rear garden structures (outbuilding and pergola); external lighting; boundary treatment; refuse storage; and photovoltaic panels. (Linked with 26/06326/LBC)

    Received 16 Sep, published by the council 23 Sep 2026 Full applications
  • 26/06340/FULL Awaiting decision

    141 Harley Street London W1G 6BQ

    Variation of Condition 1 of planning permission dated 22 December 2026 (RN: 16/05372/FULL) for: Demolition of mews buildings at 28 and 29 Devonshire Mews West and lower ground and ground floor link building at the rear of 141 Harley Street and the erection of new building to include a three storey basement to the rear of the site in connection with the use of the 141 Harley Street and the lower ground and ground floor of 143 Harley Street for Class D1 medical purposes; installation of a new passenger lift to the rear of 141 Harley Street and installation of plant. (Site includes excavation part way under the pavement of Devonshire Mews West and use swap with 126 Harley Street) namely, to allow creation of party wall openings at basement, ground and first floors; insertion of a platform lift within No. 143 from basement to first floors; partial infilling of the rear basement area; and other minor adjustments to plan form. (Linked with 26/06290/LBC)

    Received 16 Sep, published by the council 23 Sep 2026 Full applications
  • 26/06341/FULL Awaiting decision

    141 Harley Street London W1G 6BQ

    Installation of new sesame lift into existing front entrance steps. (Linked with 26/06342/LBC)

    Received 16 Sep, published by the council 23 Sep 2026 Full applications